We hurried all the way to the airport , only       that the flight had been called off because of the foggy weather .

A．being told

B．to be told

C．having told

D．to have been told

8个月婴儿，因皮肤粘膜苍白，食欲欠佳来诊，查体发现肝脾轻度肿大，化验:Hb70g/L，RBC 3.5×1012/L，血涂片可见RBC大小不等，以小细胞为主，中心淡染区扩大，最可能是

A．地中海贫血

B．再生障碍性贫血

C．铁粒幼红细胞性贫血

D．营养性巨幼细胞性贫血

E．营养性缺铁性贫血